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Retinoic acid imprints gut-homing specificity on T cells.

Abstract：

:For a preferential homing of T cells to the gut, expression of the integrin alpha4beta7 and the chemokine receptor CCR9 is essential and is induced by antigenic stimulation with dendritic cells from the gut-associated lymphoid organs. Here, we show that the vitamin A (retinol) metabolite, retinoic acid, enhances the expression of alpha4beta7 and CCR9 on T cells upon activation and imprints them with the gut tropism. Dendritic cells from the gut-associated lymphoid organs produced retinoic acid from retinol. The enhanced alpha4beta7 expression on T cells by antigenic stimulation with these dendritic cells was suppressed by the retinal dehydrogenase inhibitor citral and the retinoic acid receptor antagonist LE135. Accordingly, vitamin A deficiency caused a reduction in alpha4beta7(+) memory/activated T cells in lymphoid organs and a depletion of T cells from the intestinal lamina propria. These findings revealed a novel role for retinoic acid in the imprinting of gut-homing specificity on T cells.

journal_name

Immunity

journal_title

Immunity

authors

Iwata M,Hirakiyama A,Eshima Y,Kagechika H,Kato C,Song SY

doi

10.1016/j.immuni.2004.08.011

keywords:

subject

Has Abstract

pub_date

2004-10-01 00:00:00

pages

527-38

issue

4

eissn

1074-7613

issn

1097-4180

pii

S1074-7613(04)00247-X

journal_volume

21

pub_type

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